If a star wanders across the ceiling and shines out a skylight and into the eyes of a flying pilot, you may be held responsible with serious legal ramifications. I find the star field more interesting with the nebula cloud on rather than off, even though I originally anticipated that I would always keep that feature off.I'm really glad that these newer projectors come with independent 4-hour auto-shut-off timers, one for the star projector, and one for the nebula projector. This laser machine is GORGEOUS. This is an intriguing light show for kids, and anyone who enjoys starry nights. I grew up with stick on glow stars and now I get the adult upgrade.